I like them and they're really comfortable, but I wish I'd got GEO Grang Grang and not GEO Big Grang Grang. The different between these two models is their diameter: GEO Grang Grang is 14.2mm and GEO Big Grang Grang is 15mm. This means that your eyes will look bigger with GEO Big Grang Grang than with GEO Grang Grang.